This part is a kind of semiconductor called D209L.

Function of this product has Silicon NPN Power Transistor.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Silicon NPN Power Transistor DESCRIPTION ·High Collector-Emitter Breakdown Voltage- : V(BR)CEO= 400V(Min) ·High Switching Speed ·High Reliability isc Product Specification D209L APPLICATIONS ·Switching regulators ·Ultrasonic generators ·High frequency inverters ·General purpose power amplifiers ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VCBO Collector-Base Voltage 700 V VCEO Collector-Emitter Voltage 400 V VEBO Emitter-Base voltage 9V IC Collector Current-Continuous Collector Power Dissipation PC @ TC=25℃ TJ Junction Temperature 12 A 100 W 150 ℃ Tstg Storage Temperature Range -55~150 ℃ isc website：www.iscsemi.cn 1 INCHANGE Semiconductor isc Silicon NPN Power Transistor isc Product Specification D209L EL [ ... ]

D209L PDF Datasheet Download